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Non-aqueous electrolyte secondary battery

Assignee: Seiko Instruments Inc
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Filing: 1995-06-22
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Granted: —
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Expires: 2015-06-22
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Abstract

Abstract Translated from Japanese (57)【要約】 【構成】 負極と正極とリチウムイオン導電性の非水電 解質とから少なくとも成る非水電解質二次電池におい て、負極活物質として組成式がLi x SiO y で示さ れ、リチウム含有量xと酸素量yがそれぞれ1.5≦x ≦4、及び0<y<2となる様に規制されたリチウム含 有ケイ素酸化物を用いる。又、より好ましくは、正極活 物質としてCo、Ni、Mn、Fe、V、W、Nb及び Ti等から選ばれた遷移金属酸化物、特にリチウム含有 遷移金属酸化物を有する正極と前記の負極とを組み合わ せて用いる。 【効果】 負極活物質の電位が低く卑であり、金属リチ ウムに対して0〜1Vの卑な電位領域に於ける充放電容 量が大きく、しかも充放電時の分極(内部抵抗)が小さ いため、高電圧高エネルギー密度で且つ大電流充放電特 性に優れると共に、充放電効率が高く、デンドライト生 成による内部短絡等の不良の発生が無く、安定でサイク ル寿命が長く、信頼性の高い二次電池が得られる。 (57) [Summary] [Constitution] In a non-aqueous electrolyte secondary battery comprising at least a negative electrode, a positive electrode and a lithium ion conductive non-aqueous electrolyte, a negative electrode active material is represented by a composition formula of Li x SiO y and contains lithium. Amount x and oxygen amount y are each 1.5 ≦ x A lithium-containing silicon oxide regulated so that ≦ 4 and 0 <y <2 is used. Further, more preferably, the positive electrode having a transition metal oxide selected from Co, Ni, Mn, Fe, V, W, Nb, and Ti as a positive electrode active material, particularly a lithium-containing transition metal oxide, and the above negative electrode. Are used in combination. [Effect] Since the potential of the negative electrode active material is low and base, the charge / discharge capacity is large in a base potential region of 0 to 1 V with respect to metallic lithium, and the polarization (internal resistance) during charge / discharge is small. A high-voltage, high-energy density, high-current charging / discharging characteristic is high, charging / discharging efficiency is high, there is no occurrence of defects such as internal short circuit due to dendrite generation, stable, long cycle life, and a highly reliable secondary battery. can get.

Inventors

  • 👤 Kensuke Tawara
  • 👤 謙介 田原
  • 👤 Fumiharu Iwasaki
  • 👤 文晴 岩崎
  • 👤 Seiji Yahagi
  • 👤 誠治 矢作
  • 👤 Akihito Sakata
  • 👤 明史 坂田
  • 👤 Tsugio Sakai
  • 👤 次夫 酒井
  • 👤 Hideki Ishikawa
  • 👤 英樹 石川
  • 👤 Shinichi Takasugi
  • 👤 信一 高杉

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-08 19:41
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/485; H01M10/00; H01M10/05; H01M10/052; H01M10/0525; H01M50/00; H01M50/10; H01M50/102; H01M50/109; H01M2004/026; H01M2004/027; H01M4/13; H01M4/131; H01M4/50; H01M4/505; H01M4/52; H01M4/525; Y; Y02; Y02E; Y02E60/00; Y02E60/10

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